Supplied-Air Respirator System for Underground Coal Miners (Instruction Manual)

摘要

A Supplied Air Respirator designed for use by underground mining equipment operators is described. Its assembly, installation, operation, and maintenance are discussed. It is mounted directly on, and derived its power from, the mining machine. A hydraulic motor is required. Compressed air was supplied at 60 to 80 pounds per square inch through a 0.5 inch diameter tube to a mask. Dust is removed down to the submicron range. The authors conclude that this system provides purified air to the coal miner with the least possible interruption of comfort and efficiency.